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1
/*
2
 * MXF demuxer.
3
 * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>.
4
 *
5
 * This file is part of FFmpeg.
6
 *
7
 * FFmpeg is free software; you can redistribute it and/or
8
 * modify it under the terms of the GNU Lesser General Public
9
 * License as published by the Free Software Foundation; either
10
 * version 2.1 of the License, or (at your option) any later version.
11
 *
12
 * FFmpeg is distributed in the hope that it will be useful,
13
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15
 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
19
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20
 */
21

    
22
/*
23
 * References
24
 * SMPTE 336M KLV Data Encoding Protocol Using Key-Length-Value
25
 * SMPTE 377M MXF File Format Specifications
26
 * SMPTE 378M Operational Pattern 1a
27
 * SMPTE 379M MXF Generic Container
28
 * SMPTE 381M Mapping MPEG Streams into the MXF Generic Container
29
 * SMPTE 382M Mapping AES3 and Broadcast Wave Audio into the MXF Generic Container
30
 * SMPTE 383M Mapping DV-DIF Data to the MXF Generic Container
31
 *
32
 * Principle
33
 * Search for Track numbers which will identify essence element KLV packets.
34
 * Search for SourcePackage which define tracks which contains Track numbers.
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 * Material Package contains tracks with reference to SourcePackage tracks.
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 * Search for Descriptors (Picture, Sound) which contains codec info and parameters.
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 * Assign Descriptors to correct Tracks.
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 *
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 * Metadata reading functions read Local Tags, get InstanceUID(0x3C0A) then add MetaDataSet to MXFContext.
40
 * Metadata parsing resolves Strong References to objects.
41
 *
42
 * Simple demuxer, only OP1A supported and some files might not work at all.
43
 * Only tracks with associated descriptors will be decoded. "Highly Desirable" SMPTE 377M D.1
44
 */
45

    
46
//#define DEBUG
47

    
48
#include "avformat.h"
49
#include "aes.h"
50

    
51
typedef uint8_t UID[16];
52

    
53
enum MXFMetadataSetType {
54
    AnyType,
55
    MaterialPackage,
56
    SourcePackage,
57
    SourceClip,
58
    TimecodeComponent,
59
    Sequence,
60
    MultipleDescriptor,
61
    Descriptor,
62
    Track,
63
    EssenceContainerData,
64
    CryptoContext,
65
};
66

    
67
typedef struct MXFCryptoContext {
68
    UID uid;
69
    enum MXFMetadataSetType type;
70
    UID context_uid;
71
    UID source_container_ul;
72
} MXFCryptoContext;
73

    
74
typedef struct MXFStructuralComponent {
75
    UID uid;
76
    enum MXFMetadataSetType type;
77
    UID source_package_uid;
78
    UID data_definition_ul;
79
    int64_t duration;
80
    int64_t start_position;
81
    int source_track_id;
82
} MXFStructuralComponent;
83

    
84
typedef struct MXFSequence {
85
    UID uid;
86
    enum MXFMetadataSetType type;
87
    UID data_definition_ul;
88
    UID *structural_components_refs;
89
    int structural_components_count;
90
    int64_t duration;
91
} MXFSequence;
92

    
93
typedef struct MXFTrack {
94
    UID uid;
95
    enum MXFMetadataSetType type;
96
    MXFSequence *sequence; /* mandatory, and only one */
97
    UID sequence_ref;
98
    int track_id;
99
    uint8_t track_number[4];
100
    AVRational edit_rate;
101
} MXFTrack;
102

    
103
typedef struct MXFDescriptor {
104
    UID uid;
105
    enum MXFMetadataSetType type;
106
    UID essence_container_ul;
107
    UID essence_codec_ul;
108
    AVRational sample_rate;
109
    AVRational aspect_ratio;
110
    int width;
111
    int height;
112
    int channels;
113
    int bits_per_sample;
114
    UID *sub_descriptors_refs;
115
    int sub_descriptors_count;
116
    int linked_track_id;
117
    uint8_t *extradata;
118
    int extradata_size;
119
} MXFDescriptor;
120

    
121
typedef struct MXFPackage {
122
    UID uid;
123
    enum MXFMetadataSetType type;
124
    UID package_uid;
125
    UID *tracks_refs;
126
    int tracks_count;
127
    MXFDescriptor *descriptor; /* only one */
128
    UID descriptor_ref;
129
} MXFPackage;
130

    
131
typedef struct MXFEssenceContainerData {
132
    UID uid;
133
    enum MXFMetadataSetType type;
134
    UID linked_package_uid;
135
} MXFEssenceContainerData;
136

    
137
typedef struct {
138
    UID uid;
139
    enum MXFMetadataSetType type;
140
} MXFMetadataSet;
141

    
142
typedef struct MXFContext {
143
    UID *packages_refs;
144
    int packages_count;
145
    MXFMetadataSet **metadata_sets;
146
    int metadata_sets_count;
147
    const uint8_t *sync_key;
148
    AVFormatContext *fc;
149
    struct AVAES *aesc;
150
} MXFContext;
151

    
152
typedef struct KLVPacket {
153
    UID key;
154
    offset_t offset;
155
    uint64_t length;
156
} KLVPacket;
157

    
158
enum MXFWrappingScheme {
159
    Frame,
160
    Clip,
161
};
162

    
163
typedef struct MXFCodecUL {
164
    UID uid;
165
    enum CodecID id;
166
    enum MXFWrappingScheme wrapping;
167
} MXFCodecUL;
168

    
169
typedef struct MXFDataDefinitionUL {
170
    UID uid;
171
    enum CodecType type;
172
} MXFDataDefinitionUL;
173

    
174
typedef struct MXFMetadataReadTableEntry {
175
    const UID key;
176
    int (*read)();
177
    int ctx_size;
178
    enum MXFMetadataSetType type;
179
} MXFMetadataReadTableEntry;
180

    
181
/* partial keys to match */
182
static const uint8_t mxf_header_partition_pack_key[]       = { 0x06,0x0e,0x2b,0x34,0x02,0x05,0x01,0x01,0x0d,0x01,0x02,0x01,0x01,0x02 };
183
static const uint8_t mxf_essence_element_key[]             = { 0x06,0x0e,0x2b,0x34,0x01,0x02,0x01,0x01,0x0d,0x01,0x03,0x01 };
184
static const uint8_t mxf_klv_key[]                         = { 0x06,0x0e,0x2b,0x34 };
185
/* complete keys to match */
186
static const uint8_t mxf_encrypted_triplet_key[]           = { 0x06,0x0e,0x2b,0x34,0x02,0x04,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x7e,0x01,0x00 };
187
static const uint8_t mxf_encrypted_essence_container[]     = { 0x06,0x0e,0x2b,0x34,0x04,0x01,0x01,0x07,0x0d,0x01,0x03,0x01,0x02,0x0b,0x01,0x00 };
188

    
189
#define IS_KLV_KEY(x, y) (!memcmp(x, y, sizeof(y)))
190

    
191
#define PRINT_KEY(pc, s, x) dprintf(pc, "%s %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X %02X\n", s, \
192
                             (x)[0], (x)[1], (x)[2], (x)[3], (x)[4], (x)[5], (x)[6], (x)[7], (x)[8], (x)[9], (x)[10], (x)[11], (x)[12], (x)[13], (x)[14], (x)[15])
193

    
194
static int64_t klv_decode_ber_length(ByteIOContext *pb)
195
{
196
    uint64_t size = get_byte(pb);
197
    if (size & 0x80) { /* long form */
198
        int bytes_num = size & 0x7f;
199
        /* SMPTE 379M 5.3.4 guarantee that bytes_num must not exceed 8 bytes */
200
        if (bytes_num > 8)
201
            return -1;
202
        size = 0;
203
        while (bytes_num--)
204
            size = size << 8 | get_byte(pb);
205
    }
206
    return size;
207
}
208

    
209
static int mxf_read_sync(ByteIOContext *pb, const uint8_t *key, unsigned size)
210
{
211
    int i, b;
212
    for (i = 0; i < size && !url_feof(pb); i++) {
213
        b = get_byte(pb);
214
        if (b == key[0])
215
            i = 0;
216
        else if (b != key[i])
217
            i = -1;
218
    }
219
    return i == size;
220
}
221

    
222
static int klv_read_packet(KLVPacket *klv, ByteIOContext *pb)
223
{
224
    if (!mxf_read_sync(pb, mxf_klv_key, 4))
225
        return -1;
226
    klv->offset = url_ftell(pb) - 4;
227
    memcpy(klv->key, mxf_klv_key, 4);
228
    get_buffer(pb, klv->key + 4, 12);
229
    klv->length = klv_decode_ber_length(pb);
230
    return klv->length == -1 ? -1 : 0;
231
}
232

    
233
static int mxf_get_stream_index(AVFormatContext *s, KLVPacket *klv)
234
{
235
    int i;
236

    
237
    for (i = 0; i < s->nb_streams; i++) {
238
        MXFTrack *track = s->streams[i]->priv_data;
239
        /* SMPTE 379M 7.3 */
240
        if (!memcmp(klv->key + sizeof(mxf_essence_element_key), track->track_number, sizeof(track->track_number)))
241
            return i;
242
    }
243
    /* return 0 if only one stream, for OP Atom files with 0 as track number */
244
    return s->nb_streams == 1 ? 0 : -1;
245
}
246

    
247
/* XXX: use AVBitStreamFilter */
248
static int mxf_get_d10_aes3_packet(ByteIOContext *pb, AVStream *st, AVPacket *pkt, int64_t length)
249
{
250
    uint8_t buffer[61444];
251
    uint8_t *buf_ptr, *end_ptr, *data_ptr;
252

    
253
    if (length > 61444) /* worst case PAL 1920 samples 8 channels */
254
        return -1;
255
    get_buffer(pb, buffer, length);
256
    av_new_packet(pkt, length);
257
    data_ptr = pkt->data;
258
    end_ptr = buffer + length;
259
    buf_ptr = buffer + 4; /* skip SMPTE 331M header */
260
    for (; buf_ptr < end_ptr; buf_ptr += 4) {
261
        if (st->codec->bits_per_sample == 24) {
262
            data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4);
263
            data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4);
264
            data_ptr[2] = (buf_ptr[0] >> 4) | ((buf_ptr[1] & 0x0f) << 4);
265
            data_ptr += 3;
266
        } else {
267
            data_ptr[0] = (buf_ptr[2] >> 4) | ((buf_ptr[3] & 0x0f) << 4);
268
            data_ptr[1] = (buf_ptr[1] >> 4) | ((buf_ptr[2] & 0x0f) << 4);
269
            data_ptr += 2;
270
        }
271
    }
272
    pkt->size = data_ptr - pkt->data;
273
    return 0;
274
}
275

    
276
static int mxf_decrypt_triplet(AVFormatContext *s, AVPacket *pkt, KLVPacket *klv)
277
{
278
    static const uint8_t checkv[16] = {0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b, 0x43, 0x48, 0x55, 0x4b};
279
    MXFContext *mxf = s->priv_data;
280
    ByteIOContext *pb = &s->pb;
281
    offset_t end = url_ftell(pb) + klv->length;
282
    uint64_t size;
283
    uint64_t orig_size;
284
    uint64_t plaintext_size;
285
    uint8_t ivec[16];
286
    uint8_t tmpbuf[16];
287
    int index;
288

    
289
    if (!mxf->aesc && s->key && s->keylen == 16) {
290
        mxf->aesc = av_malloc(av_aes_size);
291
        av_aes_init(mxf->aesc, s->key, 128, 1);
292
    }
293
    // crypto context
294
    url_fskip(pb, klv_decode_ber_length(pb));
295
    // plaintext offset
296
    klv_decode_ber_length(pb);
297
    plaintext_size = get_be64(pb);
298
    // source klv key
299
    klv_decode_ber_length(pb);
300
    get_buffer(pb, klv->key, 16);
301
    if (!IS_KLV_KEY(klv, mxf_essence_element_key)) goto err_out;
302
    index = mxf_get_stream_index(s, klv);
303
    if (index < 0) goto err_out;
304
    // source size
305
    klv_decode_ber_length(pb);
306
    orig_size = get_be64(pb);
307
    if (orig_size < plaintext_size) goto err_out;
308
    // enc. code
309
    size = klv_decode_ber_length(pb);
310
    if (size < 32 || size - 32 < orig_size) goto err_out;
311
    get_buffer(pb, ivec, 16);
312
    get_buffer(pb, tmpbuf, 16);
313
    if (mxf->aesc)
314
        av_aes_crypt(mxf->aesc, tmpbuf, tmpbuf, 1, ivec, 1);
315
    if (memcmp(tmpbuf, checkv, 16))
316
        av_log(s, AV_LOG_ERROR, "probably incorrect decryption key\n");
317
    size -= 32;
318
    av_get_packet(pb, pkt, size);
319
    size -= plaintext_size;
320
    if (mxf->aesc)
321
        av_aes_crypt(mxf->aesc, &pkt->data[plaintext_size],
322
                     &pkt->data[plaintext_size], size >> 4, ivec, 1);
323
    pkt->size = orig_size;
324
    pkt->stream_index = index;
325
    url_fskip(pb, end - url_ftell(pb));
326
    return 0;
327

    
328
err_out:
329
    url_fskip(pb, end - url_ftell(pb));
330
    return -1;
331
}
332

    
333
static int mxf_read_packet(AVFormatContext *s, AVPacket *pkt)
334
{
335
    MXFContext *mxf = s->priv_data;
336
    KLVPacket klv;
337

    
338
    while (!url_feof(&s->pb)) {
339
        if (klv_read_packet(&klv, &s->pb) < 0)
340
            return -1;
341
#ifdef DEBUG
342
        PRINT_KEY(s, "read packet", klv.key);
343
#endif
344
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key)) {
345
            int res = mxf_decrypt_triplet(s, pkt, &klv);
346
            mxf->sync_key = mxf_encrypted_triplet_key;
347
            if (res < 0) {
348
                av_log(s, AV_LOG_ERROR, "invalid encoded triplet\n");
349
                return -1;
350
            }
351
            return 0;
352
        }
353
        if (IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
354
            int index = mxf_get_stream_index(s, &klv);
355
            if (index < 0) {
356
                av_log(s, AV_LOG_ERROR, "error getting stream index\n");
357
                url_fskip(&s->pb, klv.length);
358
                return -1;
359
            }
360
            /* check for 8 channels AES3 element */
361
            if (klv.key[12] == 0x06 && klv.key[13] == 0x01 && klv.key[14] == 0x10) {
362
                if (mxf_get_d10_aes3_packet(&s->pb, s->streams[index], pkt, klv.length) < 0) {
363
                    av_log(s, AV_LOG_ERROR, "error reading D-10 aes3 frame\n");
364
                    return -1;
365
                }
366
            } else
367
                av_get_packet(&s->pb, pkt, klv.length);
368
            pkt->stream_index = index;
369
            return 0;
370
        } else
371
            url_fskip(&s->pb, klv.length);
372
    }
373
    return AVERROR_IO;
374
}
375

    
376
static int mxf_add_metadata_set(MXFContext *mxf, void *metadata_set)
377
{
378
    mxf->metadata_sets = av_realloc(mxf->metadata_sets, (mxf->metadata_sets_count + 1) * sizeof(*mxf->metadata_sets));
379
    mxf->metadata_sets[mxf->metadata_sets_count] = metadata_set;
380
    mxf->metadata_sets_count++;
381
    return 0;
382
}
383

    
384
static int mxf_read_metadata_cryptographic_context(MXFCryptoContext *cryptocontext, ByteIOContext *pb, int tag)
385
{
386
    switch(tag) {
387
    case 0xFFFE:
388
        get_buffer(pb, cryptocontext->context_uid, 16);
389
        break;
390
    case 0xFFFD:
391
        get_buffer(pb, cryptocontext->source_container_ul, 16);
392
        break;
393
    }
394
    return 0;
395
}
396

    
397
static int mxf_read_metadata_content_storage(MXFContext *mxf, ByteIOContext *pb, int tag)
398
{
399
    switch (tag) {
400
    case 0x1901:
401
        mxf->packages_count = get_be32(pb);
402
        if (mxf->packages_count >= UINT_MAX / sizeof(UID))
403
            return -1;
404
        mxf->packages_refs = av_malloc(mxf->packages_count * sizeof(UID));
405
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
406
        get_buffer(pb, (uint8_t *)mxf->packages_refs, mxf->packages_count * sizeof(UID));
407
        break;
408
    }
409
    return 0;
410
}
411

    
412
static int mxf_read_metadata_source_clip(MXFStructuralComponent *source_clip, ByteIOContext *pb, int tag)
413
{
414
    switch(tag) {
415
    case 0x0202:
416
        source_clip->duration = get_be64(pb);
417
        break;
418
    case 0x1201:
419
        source_clip->start_position = get_be64(pb);
420
        break;
421
    case 0x1101:
422
        /* UMID, only get last 16 bytes */
423
        url_fskip(pb, 16);
424
        get_buffer(pb, source_clip->source_package_uid, 16);
425
        break;
426
    case 0x1102:
427
        source_clip->source_track_id = get_be32(pb);
428
        break;
429
    }
430
    return 0;
431
}
432

    
433
static int mxf_read_metadata_material_package(MXFPackage *package, ByteIOContext *pb, int tag)
434
{
435
    switch(tag) {
436
    case 0x4403:
437
        package->tracks_count = get_be32(pb);
438
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
439
            return -1;
440
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
441
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
442
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
443
        break;
444
    }
445
    return 0;
446
}
447

    
448
static int mxf_read_metadata_track(MXFTrack *track, ByteIOContext *pb, int tag)
449
{
450
    switch(tag) {
451
    case 0x4801:
452
        track->track_id = get_be32(pb);
453
        break;
454
    case 0x4804:
455
        get_buffer(pb, track->track_number, 4);
456
        break;
457
    case 0x4B01:
458
        track->edit_rate.den = get_be32(pb);
459
        track->edit_rate.num = get_be32(pb);
460
        break;
461
    case 0x4803:
462
        get_buffer(pb, track->sequence_ref, 16);
463
        break;
464
    }
465
    return 0;
466
}
467

    
468
static int mxf_read_metadata_sequence(MXFSequence *sequence, ByteIOContext *pb, int tag)
469
{
470
    switch(tag) {
471
    case 0x0202:
472
        sequence->duration = get_be64(pb);
473
        break;
474
    case 0x0201:
475
        get_buffer(pb, sequence->data_definition_ul, 16);
476
        break;
477
    case 0x1001:
478
        sequence->structural_components_count = get_be32(pb);
479
        if (sequence->structural_components_count >= UINT_MAX / sizeof(UID))
480
            return -1;
481
        sequence->structural_components_refs = av_malloc(sequence->structural_components_count * sizeof(UID));
482
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
483
        get_buffer(pb, (uint8_t *)sequence->structural_components_refs, sequence->structural_components_count * sizeof(UID));
484
        break;
485
    }
486
    return 0;
487
}
488

    
489
static int mxf_read_metadata_source_package(MXFPackage *package, ByteIOContext *pb, int tag)
490
{
491
    switch(tag) {
492
    case 0x4403:
493
        package->tracks_count = get_be32(pb);
494
        if (package->tracks_count >= UINT_MAX / sizeof(UID))
495
            return -1;
496
        package->tracks_refs = av_malloc(package->tracks_count * sizeof(UID));
497
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
498
        get_buffer(pb, (uint8_t *)package->tracks_refs, package->tracks_count * sizeof(UID));
499
        break;
500
    case 0x4401:
501
        /* UMID, only get last 16 bytes */
502
        url_fskip(pb, 16);
503
        get_buffer(pb, package->package_uid, 16);
504
        break;
505
    case 0x4701:
506
        get_buffer(pb, package->descriptor_ref, 16);
507
        break;
508
    }
509
    return 0;
510
}
511

    
512
static void mxf_read_metadata_pixel_layout(ByteIOContext *pb, MXFDescriptor *descriptor)
513
{
514
    int code;
515

    
516
    do {
517
        code = get_byte(pb);
518
        dprintf(NULL, "pixel layout: code 0x%x\n", code);
519
        switch (code) {
520
        case 0x52: /* R */
521
            descriptor->bits_per_sample += get_byte(pb);
522
            break;
523
        case 0x47: /* G */
524
            descriptor->bits_per_sample += get_byte(pb);
525
            break;
526
        case 0x42: /* B */
527
            descriptor->bits_per_sample += get_byte(pb);
528
            break;
529
        default:
530
            get_byte(pb);
531
        }
532
    } while (code != 0); /* SMPTE 377M E.2.46 */
533
}
534

    
535
static int mxf_read_metadata_generic_descriptor(MXFDescriptor *descriptor, ByteIOContext *pb, int tag, int size)
536
{
537
    switch(tag) {
538
    case 0x3F01:
539
        descriptor->sub_descriptors_count = get_be32(pb);
540
        if (descriptor->sub_descriptors_count >= UINT_MAX / sizeof(UID))
541
            return -1;
542
        descriptor->sub_descriptors_refs = av_malloc(descriptor->sub_descriptors_count * sizeof(UID));
543
        url_fskip(pb, 4); /* useless size of objects, always 16 according to specs */
544
        get_buffer(pb, (uint8_t *)descriptor->sub_descriptors_refs, descriptor->sub_descriptors_count * sizeof(UID));
545
        break;
546
    case 0x3004:
547
        get_buffer(pb, descriptor->essence_container_ul, 16);
548
        break;
549
    case 0x3006:
550
        descriptor->linked_track_id = get_be32(pb);
551
        break;
552
    case 0x3201: /* PictureEssenceCoding */
553
        get_buffer(pb, descriptor->essence_codec_ul, 16);
554
        break;
555
    case 0x3203:
556
        descriptor->width = get_be32(pb);
557
        break;
558
    case 0x3202:
559
        descriptor->height = get_be32(pb);
560
        break;
561
    case 0x320E:
562
        descriptor->aspect_ratio.num = get_be32(pb);
563
        descriptor->aspect_ratio.den = get_be32(pb);
564
        break;
565
    case 0x3D03:
566
        descriptor->sample_rate.num = get_be32(pb);
567
        descriptor->sample_rate.den = get_be32(pb);
568
        break;
569
    case 0x3D06: /* SoundEssenceCompression */
570
        get_buffer(pb, descriptor->essence_codec_ul, 16);
571
        break;
572
    case 0x3D07:
573
        descriptor->channels = get_be32(pb);
574
        break;
575
    case 0x3D01:
576
        descriptor->bits_per_sample = get_be32(pb);
577
        break;
578
    case 0x3401:
579
        mxf_read_metadata_pixel_layout(pb, descriptor);
580
        break;
581
    case 0x8201: /* Private tag used by SONY C0023S01.mxf */
582
        descriptor->extradata = av_malloc(size);
583
        descriptor->extradata_size = size;
584
        get_buffer(pb, descriptor->extradata, size);
585
        break;
586
    }
587
    return 0;
588
}
589

    
590
/* SMPTE RP224 http://www.smpte-ra.org/mdd/index.html */
591
static const MXFDataDefinitionUL mxf_data_definition_uls[] = {
592
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x01,0x00,0x00,0x00 }, CODEC_TYPE_VIDEO },
593
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x01,0x03,0x02,0x02,0x02,0x00,0x00,0x00 }, CODEC_TYPE_AUDIO },
594
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x05,0x01,0x03,0x02,0x02,0x02,0x02,0x00,0x00 }, CODEC_TYPE_AUDIO },
595
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },  CODEC_TYPE_DATA },
596
};
597

    
598
static const MXFCodecUL mxf_codec_uls[] = {
599
    /* PictureEssenceCoding */
600
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x01,0x11,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@ML Long GoP */
601

    
602
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x05 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 30Mbps PAL */
603
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x03 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 40Mbps PAL */
604
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x01,0x02,0x01,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* D-10 50Mbps PAL */
605

    
606
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML I-Frame */
607
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x02,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@ML Long GoP */
608

    
609
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x03,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MP@HL Long GoP */
610

    
611
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x02,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL I-Frame */
612
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x04,0x03,0x00 }, CODEC_ID_MPEG2VIDEO, Frame }, /* 422P@HL Long GoP */
613

    
614
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x03 },      CODEC_ID_MPEG4, Frame }, /* XDCAM proxy_pal030926.mxf */
615
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x03,0x04,0x01,0x02,0x02,0x01,0x20,0x02,0x04 },      CODEC_ID_MPEG4, Frame }, /* XDCAM Proxy C0023S01.mxf */
616

    
617
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x01,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DV25 IEC PAL */
618
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x02,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO25 PAL */
619
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x02,0x02,0x02,0x04,0x00 },    CODEC_ID_DVVIDEO, Frame }, /* DVCPRO50 PAL */
620

    
621
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x01,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_JPEG2000, Frame }, /* JPEG2000 Codestream */
622

    
623
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x01,0x02,0x01,0x7F,0x00,0x00,0x00 },   CODEC_ID_RAWVIDEO, Frame }, /* Uncompressed */
624
    /* SoundEssenceCompression */
625
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x00,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* Uncompressed */
626
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x01,0x7F,0x00,0x00,0x00 },  CODEC_ID_PCM_S16LE, Frame },
627
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x07,0x04,0x02,0x02,0x01,0x7E,0x00,0x00,0x00 },  CODEC_ID_PCM_S16BE, Frame }, /* From Omneon MXF file */
628
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_PCM_ALAW, Frame },
629
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x04,0x04,0x02,0x02,0x02,0x03,0x01,0x01,0x00 },   CODEC_ID_PCM_ALAW, Frame }, /* XDCAM Proxy C0023S01.mxf */
630
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x01,0x00 },        CODEC_ID_AC3, Frame },
631
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x05,0x00 },        CODEC_ID_MP2, Frame }, /* MP2 or MP3 */
632
  //{ { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x04,0x02,0x02,0x02,0x03,0x02,0x1C,0x00 },    CODEC_ID_DOLBY_E, Frame }, /* Dolby-E */
633
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
634
};
635

    
636
static const MXFCodecUL mxf_picture_essence_container_uls[] = {
637
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x60,0x01 }, CODEC_ID_MPEG2VIDEO, Frame }, /* MPEG-ES Frame wrapped */
638
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xe0,0x02 }, CODEC_ID_MPEG2VIDEO,  Clip }, /* MPEG-ES Clip wrapped, 0xe0 MPV stream id */
639
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x04,0x61,0x07 }, CODEC_ID_MPEG2VIDEO,  Clip }, /* MPEG-ES Custom wrapped, 0x61 ??? stream id */
640
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
641
};
642

    
643
static const MXFCodecUL mxf_sound_essence_container_uls[] = {
644
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x01,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* BWF Frame wrapped */
645
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x06,0x03,0x00 },  CODEC_ID_PCM_S16LE, Frame }, /* AES Frame wrapped */
646
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0x40,0x01 },        CODEC_ID_MP2, Frame }, /* MPEG-ES Frame wrapped, 0x40 ??? stream id */
647
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x01 },        CODEC_ID_MP2, Frame }, /* MPEG-ES Frame wrapped, 0xc0 MPA stream id */
648
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x02,0x0D,0x01,0x03,0x01,0x02,0x04,0xc0,0x02 },        CODEC_ID_MP2,  Clip }, /* MPEG-ES Clip wrapped, 0xc0 MPA stream id */
649
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x05,0x01 },  CODEC_ID_PCM_S16BE, Frame }, /* D-10 Mapping 30Mbps PAL Extended Template */
650
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x03,0x01 },  CODEC_ID_PCM_S16BE, Frame }, /* D-10 Mapping 40Mbps PAL Extended Template */
651
    { { 0x06,0x0E,0x2B,0x34,0x04,0x01,0x01,0x01,0x0D,0x01,0x03,0x01,0x02,0x01,0x01,0x01 },  CODEC_ID_PCM_S16BE, Frame }, /* D-10 Mapping 50Mbps PAL Extended Template */
652
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },       CODEC_ID_NONE, Frame },
653
};
654

    
655
/*
656
 * Match an uid independently of the version byte and up to len common bytes
657
 * Returns: boolean
658
 */
659
static int mxf_match_uid(const UID key, const UID uid, int len)
660
{
661
    int i;
662
    for (i = 0; i < len; i++) {
663
        if (i != 7 && key[i] != uid[i])
664
            return 0;
665
    }
666
    return 1;
667
}
668

    
669
static const MXFCodecUL *mxf_get_codec_ul(const MXFCodecUL *uls, UID *uid)
670
{
671
    while (uls->id != CODEC_ID_NONE) {
672
        if(mxf_match_uid(uls->uid, *uid, 16))
673
            break;
674
        uls++;
675
    }
676
    return uls;
677
}
678

    
679
static enum CodecType mxf_get_codec_type(const MXFDataDefinitionUL *uls, UID *uid)
680
{
681
    while (uls->type != CODEC_TYPE_DATA) {
682
        if(mxf_match_uid(uls->uid, *uid, 16))
683
            break;
684
        uls++;
685
    }
686
    return uls->type;
687
}
688

    
689
static void *mxf_resolve_strong_ref(MXFContext *mxf, UID *strong_ref, enum MXFMetadataSetType type)
690
{
691
    int i;
692

    
693
    if (!strong_ref)
694
        return NULL;
695
    for (i = 0; i < mxf->metadata_sets_count; i++) {
696
        if (!memcmp(*strong_ref, mxf->metadata_sets[i]->uid, 16) &&
697
            (type == AnyType || mxf->metadata_sets[i]->type == type)) {
698
            return mxf->metadata_sets[i];
699
        }
700
    }
701
    return NULL;
702
}
703

    
704
static int mxf_parse_structural_metadata(MXFContext *mxf)
705
{
706
    MXFPackage *material_package = NULL;
707
    MXFPackage *temp_package = NULL;
708
    int i, j, k;
709

    
710
    dprintf(mxf->fc, "metadata sets count %d\n", mxf->metadata_sets_count);
711
    /* TODO: handle multiple material packages (OP3x) */
712
    for (i = 0; i < mxf->packages_count; i++) {
713
        material_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[i], MaterialPackage);
714
        if (material_package) break;
715
    }
716
    if (!material_package) {
717
        av_log(mxf->fc, AV_LOG_ERROR, "no material package found\n");
718
        return -1;
719
    }
720

    
721
    for (i = 0; i < material_package->tracks_count; i++) {
722
        MXFPackage *source_package = NULL;
723
        MXFTrack *material_track = NULL;
724
        MXFTrack *source_track = NULL;
725
        MXFTrack *temp_track = NULL;
726
        MXFDescriptor *descriptor = NULL;
727
        MXFStructuralComponent *component = NULL;
728
        UID *essence_container_ul = NULL;
729
        const MXFCodecUL *codec_ul = NULL;
730
        const MXFCodecUL *container_ul = NULL;
731
        AVStream *st;
732

    
733
        if (!(material_track = mxf_resolve_strong_ref(mxf, &material_package->tracks_refs[i], Track))) {
734
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track strong ref\n");
735
            continue;
736
        }
737

    
738
        if (!(material_track->sequence = mxf_resolve_strong_ref(mxf, &material_track->sequence_ref, Sequence))) {
739
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve material track sequence strong ref\n");
740
            return -1;
741
        }
742

    
743
        /* TODO: handle multiple source clips */
744
        for (j = 0; j < material_track->sequence->structural_components_count; j++) {
745
            /* TODO: handle timecode component */
746
            component = mxf_resolve_strong_ref(mxf, &material_track->sequence->structural_components_refs[j], SourceClip);
747
            if (!component)
748
                continue;
749

    
750
            for (k = 0; k < mxf->packages_count; k++) {
751
                temp_package = mxf_resolve_strong_ref(mxf, &mxf->packages_refs[k], SourcePackage);
752
                if (!temp_package)
753
                    continue;
754
                if (!memcmp(temp_package->package_uid, component->source_package_uid, 16)) {
755
                    source_package = temp_package;
756
                    break;
757
                }
758
            }
759
            if (!source_package) {
760
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source package found\n", material_track->track_id);
761
                break;
762
            }
763
            for (k = 0; k < source_package->tracks_count; k++) {
764
                if (!(temp_track = mxf_resolve_strong_ref(mxf, &source_package->tracks_refs[k], Track))) {
765
                    av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track strong ref\n");
766
                    return -1;
767
                }
768
                if (temp_track->track_id == component->source_track_id) {
769
                    source_track = temp_track;
770
                    break;
771
                }
772
            }
773
            if (!source_track) {
774
                av_log(mxf->fc, AV_LOG_ERROR, "material track %d: no corresponding source track found\n", material_track->track_id);
775
                break;
776
            }
777
        }
778
        if (!source_track)
779
            continue;
780

    
781
        st = av_new_stream(mxf->fc, source_track->track_id);
782
        st->priv_data = source_track;
783
        st->duration = component->duration;
784
        if (st->duration == -1)
785
            st->duration = AV_NOPTS_VALUE;
786
        st->start_time = component->start_position;
787
        av_set_pts_info(st, 64, material_track->edit_rate.num, material_track->edit_rate.den);
788

    
789
        if (!(source_track->sequence = mxf_resolve_strong_ref(mxf, &source_track->sequence_ref, Sequence))) {
790
            av_log(mxf->fc, AV_LOG_ERROR, "could not resolve source track sequence strong ref\n");
791
            return -1;
792
        }
793

    
794
#ifdef DEBUG
795
        PRINT_KEY(mxf->fc, "data definition   ul", source_track->sequence->data_definition_ul);
796
#endif
797
        st->codec->codec_type = mxf_get_codec_type(mxf_data_definition_uls, &source_track->sequence->data_definition_ul);
798

    
799
        source_package->descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor_ref, AnyType);
800
        if (source_package->descriptor) {
801
            if (source_package->descriptor->type == MultipleDescriptor) {
802
                for (j = 0; j < source_package->descriptor->sub_descriptors_count; j++) {
803
                    MXFDescriptor *sub_descriptor = mxf_resolve_strong_ref(mxf, &source_package->descriptor->sub_descriptors_refs[j], Descriptor);
804

    
805
                    if (!sub_descriptor) {
806
                        av_log(mxf->fc, AV_LOG_ERROR, "could not resolve sub descriptor strong ref\n");
807
                        continue;
808
                    }
809
                    if (sub_descriptor->linked_track_id == source_track->track_id) {
810
                        descriptor = sub_descriptor;
811
                        break;
812
                    }
813
                }
814
            } else if (source_package->descriptor->type == Descriptor)
815
                descriptor = source_package->descriptor;
816
        }
817
        if (!descriptor) {
818
            av_log(mxf->fc, AV_LOG_INFO, "source track %d: stream %d, no descriptor found\n", source_track->track_id, st->index);
819
            continue;
820
        }
821
#ifdef DEBUG
822
        PRINT_KEY(mxf->fc, "essence codec     ul", descriptor->essence_codec_ul);
823
        PRINT_KEY(mxf->fc, "essence container ul", descriptor->essence_container_ul);
824
#endif
825
        essence_container_ul = &descriptor->essence_container_ul;
826
        /* HACK: replacing the original key with mxf_encrypted_essence_container
827
         * is not allowed according to s429-6, try to find correct information anyway */
828
        if (IS_KLV_KEY(essence_container_ul, mxf_encrypted_essence_container)) {
829
            av_log(mxf->fc, AV_LOG_INFO, "broken encrypted mxf file\n");
830
            for (k = 0; k < mxf->metadata_sets_count; k++) {
831
                MXFMetadataSet *metadata = mxf->metadata_sets[k];
832
                if (metadata->type == CryptoContext) {
833
                    essence_container_ul = &((MXFCryptoContext *)metadata)->source_container_ul;
834
                    break;
835
                }
836
            }
837
        }
838
        /* TODO: drop PictureEssenceCoding and SoundEssenceCompression, only check EssenceContainer */
839
        codec_ul = mxf_get_codec_ul(mxf_codec_uls, &descriptor->essence_codec_ul);
840
        st->codec->codec_id = codec_ul->id;
841
        if (descriptor->extradata) {
842
            st->codec->extradata = descriptor->extradata;
843
            st->codec->extradata_size = descriptor->extradata_size;
844
        }
845
        if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
846
            container_ul = mxf_get_codec_ul(mxf_picture_essence_container_uls, essence_container_ul);
847
            if (st->codec->codec_id == CODEC_ID_NONE)
848
                st->codec->codec_id = container_ul->id;
849
            st->codec->width = descriptor->width;
850
            st->codec->height = descriptor->height;
851
            st->codec->bits_per_sample = descriptor->bits_per_sample; /* Uncompressed */
852
            st->need_parsing = AVSTREAM_PARSE_HEADERS;
853
        } else if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
854
            container_ul = mxf_get_codec_ul(mxf_sound_essence_container_uls, essence_container_ul);
855
            if (st->codec->codec_id == CODEC_ID_NONE)
856
                st->codec->codec_id = container_ul->id;
857
            st->codec->channels = descriptor->channels;
858
            st->codec->bits_per_sample = descriptor->bits_per_sample;
859
            st->codec->sample_rate = descriptor->sample_rate.num / descriptor->sample_rate.den;
860
            /* TODO: implement CODEC_ID_RAWAUDIO */
861
            if (st->codec->codec_id == CODEC_ID_PCM_S16LE) {
862
                if (descriptor->bits_per_sample == 24)
863
                    st->codec->codec_id = CODEC_ID_PCM_S24LE;
864
                else if (descriptor->bits_per_sample == 32)
865
                    st->codec->codec_id = CODEC_ID_PCM_S32LE;
866
            } else if (st->codec->codec_id == CODEC_ID_PCM_S16BE) {
867
                if (descriptor->bits_per_sample == 24)
868
                    st->codec->codec_id = CODEC_ID_PCM_S24BE;
869
                else if (descriptor->bits_per_sample == 32)
870
                    st->codec->codec_id = CODEC_ID_PCM_S32BE;
871
                if (descriptor->essence_container_ul[13] == 0x01) /* D-10 Mapping */
872
                    st->codec->channels = 8; /* force channels to 8 */
873
            } else if (st->codec->codec_id == CODEC_ID_MP2) {
874
                st->need_parsing = AVSTREAM_PARSE_FULL;
875
            }
876
        }
877
        if (container_ul && container_ul->wrapping == Clip) {
878
            dprintf(mxf->fc, "stream %d: clip wrapped essence\n", st->index);
879
            st->need_parsing = AVSTREAM_PARSE_FULL;
880
        }
881
    }
882
    return 0;
883
}
884

    
885
static const MXFMetadataReadTableEntry mxf_metadata_read_table[] = {
886
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x18,0x00 }, mxf_read_metadata_content_storage, 0, AnyType },
887
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x37,0x00 }, mxf_read_metadata_source_package, sizeof(MXFPackage), SourcePackage },
888
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x36,0x00 }, mxf_read_metadata_material_package, sizeof(MXFPackage), MaterialPackage },
889
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x0F,0x00 }, mxf_read_metadata_sequence, sizeof(MXFSequence), Sequence },
890
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x11,0x00 }, mxf_read_metadata_source_clip, sizeof(MXFStructuralComponent), SourceClip },
891
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x44,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), MultipleDescriptor },
892
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x42,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Generic Sound */
893
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x28,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* CDCI */
894
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x29,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* RGBA */
895
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x51,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* MPEG 2 Video */
896
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x48,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* Wave */
897
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x47,0x00 }, mxf_read_metadata_generic_descriptor, sizeof(MXFDescriptor), Descriptor }, /* AES3 */
898
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3A,0x00 }, mxf_read_metadata_track, sizeof(MXFTrack), Track }, /* Static Track */
899
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x01,0x01,0x01,0x01,0x3B,0x00 }, mxf_read_metadata_track, sizeof(MXFTrack), Track }, /* Generic Track */
900
    { { 0x06,0x0E,0x2B,0x34,0x02,0x53,0x01,0x01,0x0d,0x01,0x04,0x01,0x02,0x02,0x00,0x00 }, mxf_read_metadata_cryptographic_context, sizeof(MXFCryptoContext), CryptoContext },
901
    { { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, NULL, 0, AnyType },
902
};
903

    
904
static int mxf_read_local_tags(MXFContext *mxf, KLVPacket *klv, int (*read_child)(), int ctx_size, enum MXFMetadataSetType type)
905
{
906
    ByteIOContext *pb = &mxf->fc->pb;
907
    MXFMetadataSet *ctx = ctx_size ? av_mallocz(ctx_size) : mxf;
908
    uint64_t klv_end= url_ftell(pb) + klv->length;
909

    
910
    while (url_ftell(pb) + 4 < klv_end) {
911
        int tag = get_be16(pb);
912
        int size = get_be16(pb); /* KLV specified by 0x53 */
913
        uint64_t next= url_ftell(pb) + size;
914

    
915
        if (!size) { /* ignore empty tag, needed for some files with empty UMID tag */
916
            av_log(mxf->fc, AV_LOG_ERROR, "local tag 0x%04X with 0 size\n", tag);
917
            continue;
918
        }
919
        if(ctx_size && tag == 0x3C0A)
920
            get_buffer(pb, ctx->uid, 16);
921
        else
922
            read_child(ctx, pb, tag, size);
923

    
924
        url_fseek(pb, next, SEEK_SET);
925
    }
926
    if (ctx_size) ctx->type = type;
927
    return ctx_size ? mxf_add_metadata_set(mxf, ctx) : 0;
928
}
929

    
930
static int mxf_read_header(AVFormatContext *s, AVFormatParameters *ap)
931
{
932
    MXFContext *mxf = s->priv_data;
933
    KLVPacket klv;
934

    
935
    mxf->sync_key = mxf_essence_element_key;
936
    if (!mxf_read_sync(&s->pb, mxf_header_partition_pack_key, 14)) {
937
        av_log(s, AV_LOG_ERROR, "could not find header partition pack key\n");
938
        return -1;
939
    }
940
    url_fseek(&s->pb, -14, SEEK_CUR);
941
    mxf->fc = s;
942
    while (!url_feof(&s->pb)) {
943
        const MXFMetadataReadTableEntry *metadata;
944

    
945
        if (klv_read_packet(&klv, &s->pb) < 0)
946
            return -1;
947
#ifdef DEBUG
948
        PRINT_KEY(s, "read header", klv.key);
949
#endif
950
        if (IS_KLV_KEY(klv.key, mxf_encrypted_triplet_key) ||
951
            IS_KLV_KEY(klv.key, mxf_essence_element_key)) {
952
            /* FIXME avoid seek */
953
            url_fseek(&s->pb, klv.offset, SEEK_SET);
954
            break;
955
        }
956

    
957
        for (metadata = mxf_metadata_read_table; metadata->read; metadata++) {
958
            if (IS_KLV_KEY(klv.key, metadata->key)) {
959
                if (mxf_read_local_tags(mxf, &klv, metadata->read, metadata->ctx_size, metadata->type) < 0) {
960
                    av_log(s, AV_LOG_ERROR, "error reading header metadata\n");
961
                    return -1;
962
                }
963
                break;
964
            }
965
        }
966
        if (!metadata->read)
967
            url_fskip(&s->pb, klv.length);
968
    }
969
    return mxf_parse_structural_metadata(mxf);
970
}
971

    
972
static int mxf_read_close(AVFormatContext *s)
973
{
974
    MXFContext *mxf = s->priv_data;
975
    int i;
976

    
977
    av_freep(&mxf->packages_refs);
978
    for (i = 0; i < mxf->metadata_sets_count; i++) {
979
        switch (mxf->metadata_sets[i]->type) {
980
        case MultipleDescriptor:
981
            av_freep(&((MXFDescriptor *)mxf->metadata_sets[i])->sub_descriptors_refs);
982
            break;
983
        case Sequence:
984
            av_freep(&((MXFSequence *)mxf->metadata_sets[i])->structural_components_refs);
985
            break;
986
        case SourcePackage:
987
        case MaterialPackage:
988
            av_freep(&((MXFPackage *)mxf->metadata_sets[i])->tracks_refs);
989
            break;
990
        default:
991
            break;
992
        }
993
        av_freep(&mxf->metadata_sets[i]);
994
    }
995
    av_freep(&mxf->metadata_sets);
996
    av_freep(&mxf->aesc);
997
    return 0;
998
}
999

    
1000
static int mxf_probe(AVProbeData *p) {
1001
    uint8_t *bufp = p->buf;
1002
    uint8_t *end = p->buf + p->buf_size;
1003

    
1004
    if (p->buf_size < sizeof(mxf_header_partition_pack_key))
1005
        return 0;
1006

    
1007
    /* Must skip Run-In Sequence and search for MXF header partition pack key SMPTE 377M 5.5 */
1008
    end -= sizeof(mxf_header_partition_pack_key);
1009
    for (; bufp < end; bufp++) {
1010
        if (IS_KLV_KEY(bufp, mxf_header_partition_pack_key))
1011
            return AVPROBE_SCORE_MAX;
1012
    }
1013
    return 0;
1014
}
1015

    
1016
/* rudimentary byte seek */
1017
/* XXX: use MXF Index */
1018
static int mxf_read_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
1019
{
1020
    MXFContext *mxf = s->priv_data;
1021
    AVStream *st = s->streams[stream_index];
1022
    int64_t seconds;
1023

    
1024
    if (!s->bit_rate)
1025
        return -1;
1026
    if (sample_time < 0)
1027
        sample_time = 0;
1028
    seconds = av_rescale(sample_time, st->time_base.num, st->time_base.den);
1029
    url_fseek(&s->pb, (s->bit_rate * seconds) >> 3, SEEK_SET);
1030
    if (!mxf_read_sync(&s->pb, mxf->sync_key, 12))
1031
        return -1;
1032

    
1033
    /* found KLV key */
1034
    url_fseek(&s->pb, -12, SEEK_CUR);
1035
    av_update_cur_dts(s, st, sample_time);
1036
    return 0;
1037
}
1038

    
1039
AVInputFormat mxf_demuxer = {
1040
    "mxf",
1041
    "MXF format",
1042
    sizeof(MXFContext),
1043
    mxf_probe,
1044
    mxf_read_header,
1045
    mxf_read_packet,
1046
    mxf_read_close,
1047
    mxf_read_seek,
1048
};